From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 374F3AD23 for ; Thu, 27 Oct 2022 17:08:52 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 89050C433C1; Thu, 27 Oct 2022 17:08:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1666890532; bh=UQRfWcoinUU2bhyZVw9s8+42cqyer5C+PYmCFCalsWI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=do2oxFxw9cQ7W7KDSry8Wn85bva+gkhXERHpl9vfAzMPh9qKdbhNHmlLIkmZNNCgp BuYPdfPuL7cmYxVVh5GvglWKNjwqZOT04UEYCSHWtN4pVtquJRLggBLWKgRGVfOjfd Hs9E5L+nizbwv7B7iChgqLJomaoW+grcF6QPSDuM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Joseph Qi , Yan Wang , Mark Fasheh , Joel Becker , Junxiao Bi , Changwei Ge , Gang He , Jun Piao , Andrew Morton Subject: [PATCH 5.4 27/53] ocfs2: clear dinode links count in case of error Date: Thu, 27 Oct 2022 18:56:15 +0200 Message-Id: <20221027165050.837268518@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221027165049.817124510@linuxfoundation.org> References: <20221027165049.817124510@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Joseph Qi commit 28f4821b1b53e0649706912e810c6c232fc506f9 upstream. In ocfs2_mknod(), if error occurs after dinode successfully allocated, ocfs2 i_links_count will not be 0. So even though we clear inode i_nlink before iput in error handling, it still won't wipe inode since we'll refresh inode from dinode during inode lock. So just like clear inode i_nlink, we clear ocfs2 i_links_count as well. Also do the same change for ocfs2_symlink(). Link: https://lkml.kernel.org/r/20221017130227.234480-2-joseph.qi@linux.alibaba.com Signed-off-by: Joseph Qi Reported-by: Yan Wang Cc: Mark Fasheh Cc: Joel Becker Cc: Junxiao Bi Cc: Changwei Ge Cc: Gang He Cc: Jun Piao Cc: Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman --- fs/ocfs2/namei.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) --- a/fs/ocfs2/namei.c +++ b/fs/ocfs2/namei.c @@ -231,6 +231,7 @@ static int ocfs2_mknod(struct inode *dir handle_t *handle = NULL; struct ocfs2_super *osb; struct ocfs2_dinode *dirfe; + struct ocfs2_dinode *fe = NULL; struct buffer_head *new_fe_bh = NULL; struct inode *inode = NULL; struct ocfs2_alloc_context *inode_ac = NULL; @@ -381,6 +382,7 @@ static int ocfs2_mknod(struct inode *dir goto leave; } + fe = (struct ocfs2_dinode *) new_fe_bh->b_data; if (S_ISDIR(mode)) { status = ocfs2_fill_new_dir(osb, handle, dir, inode, new_fe_bh, data_ac, meta_ac); @@ -446,8 +448,11 @@ static int ocfs2_mknod(struct inode *dir leave: if (status < 0 && did_quota_inode) dquot_free_inode(inode); - if (handle) + if (handle) { + if (status < 0 && fe) + ocfs2_set_links_count(fe, 0); ocfs2_commit_trans(osb, handle); + } ocfs2_inode_unlock(dir, 1); if (did_block_signals) @@ -2017,8 +2022,11 @@ bail: ocfs2_clusters_to_bytes(osb->sb, 1)); if (status < 0 && did_quota_inode) dquot_free_inode(inode); - if (handle) + if (handle) { + if (status < 0 && fe) + ocfs2_set_links_count(fe, 0); ocfs2_commit_trans(osb, handle); + } ocfs2_inode_unlock(dir, 1); if (did_block_signals)